I would say kbuild-2.5 appears to be beta and getting ready for Linus submittal.

Eric Raymond's CML2 has little chance of getting in the kernel, when he has consistently ignored threads of discussion relating to CML2, specifically feedback from Linus, myself, and others... If he updates his CML2 per feedback, _then_ I would consider it beta and ready for inclusion. Otherwise it is IMO D.O.A.